/*
 * Copyright 2013-2014 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.cloud.config.client;

import org.aspectj.lang.annotation.Aspect;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.aop.AopAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.retry.annotation.EnableRetry;
import org.springframework.retry.annotation.Retryable;
import org.springframework.retry.interceptor.RetryInterceptorBuilder;
import org.springframework.retry.interceptor.RetryOperationsInterceptor;

/**
 * spring cloud client源代码
 *
 * @author Dave Syer
 */
@Configuration
@EnableConfigurationProperties
public class ConfigServiceBootstrapConfiguration {

    @Autowired
    private ConfigurableEnvironment environment;

    @Bean
    public ConfigClientProperties configClientProperties() {
        return new ConfigClientProperties(this.environment);
    }

    @Bean
    @ConditionalOnProperty(value = "spring.cloud.config.enabled", matchIfMissing = true)
    public ConfigServicePropertySourceLocator configServicePropertySource(ConfigClientProperties properties) {
        return new ConfigServicePropertySourceLocator(
                properties);
    }

    @ConditionalOnProperty(value = "spring.cloud.config.failFast", matchIfMissing = false)
    @ConditionalOnClass({Retryable.class, Aspect.class, AopAutoConfiguration.class})
    @Configuration
    @EnableRetry(proxyTargetClass = true)
    @Import(AopAutoConfiguration.class)
    @EnableConfigurationProperties(RetryProperties.class)
    protected static class RetryConfiguration {

        @Bean
        @ConditionalOnMissingBean(name = "configServerRetryInterceptor")
        public RetryOperationsInterceptor configServerRetryInterceptor(
                RetryProperties properties) {
            return RetryInterceptorBuilder
                    .stateless()
                    .backOffOptions(properties.getInitialInterval(),
                            properties.getMultiplier(), properties.getMaxInterval())
                    .maxAttempts(properties.getMaxAttempts()).build();
        }
    }

}
